Ensure your smartphone is connected to the soundbar via Bluetooth. Launch the App: Open the LG Soundbar app and select your from the device list.
can be updated through two primary methods: the dedicated LG Soundbar mobile application or a manual USB transfer. lg soundbar nb4540 software update
This is the step where caution is required. Ensure your smartphone is connected to the soundbar
| Issue | Solution | | :--- | :--- | | No Update appears on screen | The USB is not FAT32, or the file is in a folder. | | Soundbar freezes during update | Unplug power for 30 seconds. Retry with a different USB drive. | | Subwoofer still drops out after update | Pair the subwoofer manually: Press the "Pairing" button on the back of the sub with a paperclip while the bar is on. | This is the step where caution is required
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